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Unit 8

Gases

TermDefinition
Pressure defined as the force per unit area on a surface
Newton the force that will increase the speed of a one kilogram mass by one meter or second each second that the force is applied
Barometer a device used to measure atmospheric pressure
Millimeters of Mercury the common unit of pressure os millimeters of Mercury symbolized mm hg
Atmosphere of Pressure one atmosphere of pressure is defined as being exactly equivalent to 760 mm hg
Pascal defined as the pressure exerted by a fore of one newton acting on an area of one square meter
Partial Pressure the pressure of each gas in a mixture is called the partial pressure of that gas
Dalton's law of partial pressure states that the total pressure of a gas mixture is the sum of the partial pressures of the component gases
Boyles Law states that the volume of a mixed mass o gas varies inversely with the pressure at constant temperature
Absolute Zero the lowest possible achievable temperature is assigned the value of zero on the kelvin temperature scale
Charle's law states that the volume of a fixed mass of gas at constant pressure varies directly with the temperature in kelvins
Gay-Lussac's law the pressure of a mixed mass of gas at constant volume varies directly with the temperature in kelvins
Combined gas law expresses the relationship between pressure volume and temperature of a fixed amount of gas
Avogadro's law states that equal volumes of gases at the same temperature and pressure contain equal number of molecules
Standard molar volume of a gas the volume occupied by one mole of a gas at STP is known as the standard molar volume of a gas. It has been found to be 22.414 10 L
ideal gas law the mathematical relationship among pressure volume temperature and the number of moles of gas
ideal gas constant in the equation representing the ideal gas law the constant R is known as the ideal gas constant
Graham's law of effusion states that the rate of effusion of gases at the same temperature and pressure are inversely proportional to the square roots of their molar masses
Created by: fm4208251
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